Take your time to read instructions before taking this test.

There are 40 questions which you are to answer in 15 minutes that gives you roughly 30 seconds per question.

If you can get at least 60%, you can be rest assured that you’ll ace CHM 204 exam

In a normal exam you will be asked between 40 – 60 questions but I only arranged 40 questions

Note

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70 – 100 A

60 – 69 B

50 – 59 C

45 – 49 D

40 – 44 E

0 – 39 F

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Created on June 21, 2024 By

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CHM 204

1 / 40

The presence of an aromatic ring in a compound is detected by ____________

A. Infrared spectroscopy

B. Ultraviolet spectroscopy

C. Chromatography

D. Mass spectroscopy

2 / 40

2. The reaction of benzene with propanoyl chloride in the presence of Aluminum chloride will yeild _____

A. Acetophenone

B. Phenyl methyl ketone

C. Phenyl acetone

D. Phenyl propyl ketone

3 / 40

3. phenol is regarded as an acid because _____

A. it’s volatile

B. it easily releases a proton due to resonance

C. it’s insoluble in water

D. it’s corrosive to the skin

4 / 40

4. The following terms can be used to describe cellulose except ____

A. Polysaccharide

B. Biomass

C. Bioenzyme

D. Polymer

5 / 40

The substitution of an acyl group into an aromatic ring by the reaction with an acid chloride in the presence of Lewis acid is called ____________

A. Hyperconjugation

B. Hydrogenation

C. Friedel - Craft acylation

D. Friedel - Craft akylation

6 / 40

RCHO stands for ----- functional group.

A. Alcohol

B. Aldehyde

C. Ester

D. Ketone

7 / 40

7. A positive test to Benedict’s reagent is indicated by ___

A. Brown to blue

B. Brick-red to brown

C. Blue to brick-red

D. Brick-red to blue

8 / 40

Ethane is sp3 hybridized molecules and has ---- bond angle

A. 120.5degrees

B. 190.5 degrees

C. 90.5 degrees

D. 45.5 degrees

9 / 40

9. The method of reduction of the carbonyl group of ketone produced by Friedel -crafts acylation is ------------ reduction.

A. Alkylation

B. Clemenson

C. Acylation

D. Electrophilic

10 / 40

10.

) [CH3Co]20 is ______

A. Dicarboxylic acid

B. An anhydride

C. An ether

D. An amide

11 / 40

11. which of the following can be used to elongate a sugar ?

A. H.C.N

B. N.H2.OH

C. All

D. Na.BH4

12 / 40

12. Which of the following is the formula for Hydroxylamine ?

A. H2.N.OH

B. C6.H5.NH-OH

C. CH3.NH2.OH

D. CH2.OH

13 / 40

13. An oil sample high in 9,12,15 octadecentrienic acid _____

A. likely to be highly saturated

B. useful in the manufacture of margarine

C. useful in the manufacture of paints

D. likely not to be reactive with iodine

14 / 40

14.

Identify the most acidic compound from the following options

A. C3.H7.COOH

B. Cl2.CH.COOH

C. Cl.CH2.COOH

D. C2.H5.COOH

15 / 40

15. The process by which benzene and its derivatives are extracted from petroleum is called ___________

A. Aromatization

B. Cracking

C. Hydroforming

D. Polymerization

16 / 40

16.

Hydrogenation of benzene at higher temperature and under pressure yields ________

A. Benzaldehyde

B. Cyclohexene

C. Cyclohexyne

D. Cyclohexane

17 / 40

17.

RNH2 stands for class of compound called --------

A. Aromatics

B. Amides

C. Amines

D. Esters

18 / 40

18. Bleaching powder provides chlorine which oxidizes ethanol to _________.

A. Ethyne

B. Ethane

C. Ethene

D. Ethanal

19 / 40

19. Denaturation involves the loss of what type of structure?

A. Secondary

B. Secondary and Tertiary

C. Primary

D. Tertiary

20 / 40

20.

A benzenoid hydrocarbon in which two benzene rings are fused together at the ortho position is called ____________

A. Naphthalene

B. Phenanthrene

C. Biphenyl

D. Anthracene

21 / 40

21.

180o bond angle is characteristic of ------ molecules
Oxidized

A. Sp hybridized

B. Sp2 hybridized

C. Sp3 hybridized

D. None

22 / 40

22. Another name for methyl benzene is __________

A. Phenol

B. Xylene

C. Naphthalene

D. Toluene

23 / 40

23. Basic hydrolysis of any oil can produce ___

A. oil hydrolyte

B. hydrated oil

C. Soap

D. oil hydrolyte

24 / 40

24. Which of these functional group Is not found in the structure of urea ?

A. Carbon2I

B. Hydroxyl

C. Amide

D. Thiol

25 / 40

25. Beside peptide bond,what other covalent bonds are commonly found in peptides ?

A. hndrophobic bond

B. ether bond

C. disulfide bond

D. hydrogen bond

26 / 40

26. The most widely used method for the preparation of alkyl halides is from __________

A. Alcohol

B. Alkanes

C. Grignard Reagent

D. Alekenes

27 / 40

27. Reacting acid anhydride with benzene will produce _____

A. aldehyde,ketone and alcohol

B. the reaction would not occur because of steric hinderance

C. ketone and carboxylic acid

D. esters,alcohol and carboxylic acid

28 / 40

28. Polymerization of ethyne produces ?

A. Benzene

B. none of the above

C. Benzoic acid

D. polyethyne

29 / 40

29. The following will turn blue black with iodine except ____

A. Guinea corn

B. Garri

C. Groundnut

D. Pupuru

30 / 40

30. The E2 reactions of alkyl halides are favoured by the use of __________

A. Strong Base

B. Weak Acid

C. Weak Base

D. Strong Acid

31 / 40

31. CH3CH2CH2.C(CH3)2.OH is ?

A. 2,2-dimethyl-2-butanol

B. 2,2-dimethyl-1-pentanol

C. 2-methyl-1-butan-1-ol

D. 2,2-dimethyl-1-butanol

32 / 40

32. There are ---------- resonance structures of benzene

A. 5

B. 4

C. 3

D. 2

33 / 40

33.

A functional group in a molecule exhibits characteristic ------

A. Colour change

B. Odour change

C. Chemical properties

D. Physical properties

34 / 40

34.

The cannonical forms of benzene were proposed by _____________

A. Dalton and Dewar

B. Kekule and Dalton

C. Kekule and Dewar

D. None of the options

35 / 40

35. The easiest way to recognize phenylamine in the laboratory is ___

A. solubility in water

B. phenolic odour

C. Strong fishy smell

D. solubility in acid

36 / 40

36.

The parent compound of polynuclear hydrocarbons is ___________

A. Naphthalene

B. Biphenyl

C. Phenatrene

D. Anthracene

37 / 40

37. CH3.COOH has a greater miscibility with water than CH3.CH3-CH2-COOH. The reason is due to ?___

A. Mutual incompatibility

B. Lower molecular weight

C. Ionization

D. Hydrogen bonding

38 / 40

38. Saponification reaction is best described as _____

A. Soap making reaction

B. Condensation reaction

C. Base promoted hydrolysis reaction

D. Acid promoted hydrolysis reaction

39 / 40

39. The enzyme responsible for fermentation of bread in yeast is ?

A. Zymase

B. Yeastose

C. Ketose

D. Zylose

40 / 40

40. Sulphonation of benzene yields ___________

A. Sulphric acid

B. Sulphonic acid

C. Auto sulphur benzene

D. Para sulphur benzene

Your score is

The average score is 43%

CHM 204 CBT PRACTICE

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